Mesoporous graphene-like nanobowls as Pt electrocatalyst support for highly active and stable methanol oxidation
Mesoporous graphene-like nanobowls as Pt electrocatalyst support for highly active and stable methanol oxidation
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介孔石墨烯纳米碗作为铂电催化剂支持高活性和稳定的甲醇氧化
DOI：
10.1016/j.jpowsour.2015.03.083
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发表时间：
2015-06
影响因子：
9.2
通讯作者：
Xie, Jimin
中科院分区：
文献类型：
--
作者：
Jiang, Zhifeng;Wei, Wei;Gao, Lina;Xie, Jimin
采用模板法合成了具有高比表面积（1091 m2 g −1）、高孔容（2.7 cm 3 g − 1）和平均孔径（9.8 nm）的介孔类石墨烯纳米碗（GLB）。GLB具有优良的导电性和化学惰性，表现出良好的传质、抗中毒和稳定负载小Pt颗粒的特性。因此，Pt/GLB催化剂对甲醇氧化反应（莫尔）的活性和稳定性远高于商品Pt/C（TKK）催化剂。其中，用于莫尔还原的Pt/GLB（2075 mA mgPt-1）上的峰值电流密度是商业Pt/C（723 mA mgPt-1）的2.87倍;并且与后者相比，前者上的莫尔还原的起始电位负移约160 mV。Pt/GLB的催化性能也优于Pt负载于介孔无定形碳纳米碗（Pt/BLC）的催化性能，表明石墨对Pt催化性能有促进作用。
Mesoporous graphene-like nanobowls (GLBs) with high surface area of 1091 m2g−1, high pore volume of 2.7 cm3g−1and average pore diameter of 9.8 nm are synthesized through template method. The GLBs with inherent excellent electrical conductivity and chemical inertia show the properties of well mass transfer, poison resistance and stable loading of smaller Pt particles. Therefore, the Pt/GLB catalyst shows much higher activity and stability than that of commercial Pt/C (TKK) for methanol oxidation reaction (MOR). Therein, the peak current density on Pt/GLB (2075 mA mgPt−1) for MOR is 2.87 times that of commercial Pt/C (723 mA mgPt−1); and the onset potential for the MOR on the former is negatively shifted about 160 mV compared with that on the latter. The catalytic performances of the Pt/GLB are also better than those of the Pt loading on mesoporous amorphous carbon nanobowls (Pt/BLC), indicating promotion effect of graphite on Pt catalytic performance.
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